Answer:
When entering a cross-section description in the Name text box of the "New Section" dialog box, all cross-section series containing the search term are suggested. For example, when entering HEA, cross-sections of the series HEAA or HEAT are also suggested.
To ensure the search gives you only the exact hits, enter quotation marks at the beginning of the term you search. The search term for an HEA section is then: "HEA
